The book is a modern English translation of the Rig Veda Samhitaa - the most ancient document. This is a word for word translation so as to enable the learned readers to contemplate the meaning of the Mantras themselves. The text is written in easy conversational modern English. The Series has been divided into 4 volumes. The book is a must for the scholars and the shelves of all the libraries. The book is the Fourth volume in the series. It deals with Mandala 9 and 10 of the Rig Veda Samhitaa. All the Sooktas of the Ninth Mandala are dedicated to Pavamana Soma. It consists of one hundred and fourteen Sooktas. The Tenth Mandala is believed to be the collection of later hymns of the Rig Veda by some scholars. It is the second largest Mandala and contains many well known Sooktas. Prasanna Chandra Gautam was born in Nepal in an orthodox Braahmin family of renowned academics and was educated in Nepal, India and the United Kingdom. He retired as Senior Lecturer in Medicine and Consultant Physician. His interests outside medicine include ancient history and philosophy. Besides scores of technical papers in medicine and textbooks, he has published a novel, a biography, a memoir and a book and articles on the Rig Veda. He is also the principal translator and editor of the translation of the Rig Veda Samhitaa in Nepali.